The game was GoGoD 1998-02-05c, between Lee Changho (W) and Yu Ch'ang-hyeok.
As Dave indicates, the 2d line hane for
is a minor error, losing 7% to the 3d line crawl, according to Elf. The mainline variation for
will give us something to compare against the game continuation and the mainline variation for
.
- Click Here To Show Diagram Code
[go]$$Wcm22 Mainline for
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . 9 4 3 5 . . |
$$ | . . . . . 6 . . . . . . 8 O 7 X O . . |
$$ | . . . O . . . . . , . . . . . X 1 . . |
$$ | . . . . . . . . . . . . . . . 2 . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . X O . . . . . , . . . . . X . . . |
$$ | . . X O O X . O . . O . . . . . . . . |
$$ | . . X X O . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
could also be at
24.
switches to the top left corner, but
at
30 is also playable.
captures
.
- Click Here To Show Diagram Code
[go]$$Bcm31 Mainline for , continued
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . 5 . . . . . . O X O O . . |
$$ | . a 1 3 . X . . . . . . X O O X O . . |
$$ | . . 2 O 4 . . . . , . . . . . X O . . |
$$ | . . . . . . . . . . . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . 6 . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . X O . . . . . , . . . . . X . . . |
$$ | . . X O O X . O . . O . . 7 . . . . . |
$$ | . . X X O . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
invades the top left corner.
blocks on the left side, but, as usual, blocking at
33 is also playable.
makes the shape play, preventing a Black bulge with sente.
could also descend at
a. Then
makes a 3 space high extension. Next,
encloses the bottom right corner.
Game continuation
- Click Here To Show Diagram Code
[go]$$Bcm23 Mistake
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . 1 O 2 . . |
$$ | . . . . . . . . . . . . . O 3 X O . . |
$$ | . . . O . . . . . , . . . 5 . X . . . |
$$ | . . . . . . . . . . . . . . . . . 4 . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . B . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . X O . . . . . , . . . . . X . . . |
$$ | . . X O O X . O . . O . . . . . . . . |
$$ | . . X X O . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
The block on the top side was a mistake.
-
were also Elf's top choices. White has taken the corner and Black has made a solid shape. To me,
seems a bit misplaced.
Top choice: Block on the right side.
- Click Here To Show Diagram Code
[go]$$Bcm23 Mainline for
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O 4 2 . |
$$ | . . . . . . . . . . . . . W . X O 3 . |
$$ | . . . O . . . . . , . . . . . X 1 . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . B . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . X O . . . . . , . . . . . X . . . |
$$ | . . X O O X . O . . O . . . . . . . . |
$$ | . . X X O . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Blocking on the right side allows White to connect out to
, but Black takes sente, and
looks nicely placed.
Not too much to add, I think. With the right hand block the local position looks better to me, and the sente/gote difference is significant.
The mainline for
looks more interesting, but the hane was only a minor error.